TIFF file(s) causing DROID to hang

[Dclipsham]

The attached TIFF file causes DROID to hang - basically a scan never completes. This isn't the only one - others from the same digitized batch have the same issue. (I've attached within a zip but scanning from within or without the zip has the same hang issue)

I can't see anything obviously broken within the file, but I'm getting no clue from DROID logs as to why it's problematic. It might well be some interesting TIFF subset format, but even if it is, that would typically still give me a result and I could look at improving PRONOM.
RGE0021-B23F26-0001-008.zip

Environment details:
DROID 6.8, Windows 10, Java 11 OpenJDK as supplied in the DROID binary

David

[MancunianSam]

I think this is a bug. DROID is getting stuck in an infinite loop trying to match the right fragments for this signature

The steps are something like:

1. It finds matches for 7 of the 8 right fragments.
2. It adds these to a matched list
3. It doesn't find a match for the 8th fragment
4. It then searches each of the fragments in the matched list to either side of the previous matches.
5. Fragments 1-7 match and so stay in the matched list
6. The last matched fragment position is set to 7
7. The loop checking each fragment increments the fragment position to 8
8. It doesn't find a match for the 8th fragment
9. Repeat steps 3 - 9

The problem I think is step 6. It shouldn't be changing the loop counter.

I've made a change on a branch and built the droid-core jar from this branch

If you unzip the attached file and drop droid-core-6.8.0.jar into the /lib folder where DROID is installed then can you try matching the file again please.

droid-core.zip